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Finding the Fourth Proportional to 371.20, 511.68 and 254.56

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Solution

The fourth proportional to 371.20, 511.68 and 254.56 is: 350.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    371.20 : 511.68 = 254.56 : x
  2. Step 2: Convert to fraction form
    371.20/511.68 = 254.56/x
  3. Step 3: Cross multiply
    371.20x = 511.68 × 254.56
  4. Step 4: Simplify right side
    371.20x = 130,253.26
  5. Step 5: Solve for x
    x = 130,253.26/371.20
  6. Step 6: Final answer
    x = 350.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.